From patchwork Fri Sep 4 14:54:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 11757683 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D8EB5618 for ; Fri, 4 Sep 2020 15:01:11 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B38A32073B for ; Fri, 4 Sep 2020 15:01:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B38A32073B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59358 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kEDDC-0002ZE-R8 for patchwork-qemu-devel@patchwork.kernel.org; Fri, 04 Sep 2020 11:01:10 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41270) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kED8H-0000t1-AA for qemu-devel@nongnu.org; Fri, 04 Sep 2020 10:56:05 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:26131 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kED8E-0007Dt-6Q for qemu-devel@nongnu.org; Fri, 04 Sep 2020 10:56:05 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-428-75y9-7LAPZ2v8dDOmMd64w-1; Fri, 04 Sep 2020 10:54:49 -0400 X-MC-Unique: 75y9-7LAPZ2v8dDOmMd64w-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C189B8D3289 for ; Fri, 4 Sep 2020 14:54:48 +0000 (UTC) Received: from vitty.brq.redhat.com (unknown [10.40.194.104]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3326B7A1F4; Fri, 4 Sep 2020 14:54:47 +0000 (UTC) From: Vitaly Kuznetsov To: qemu-devel@nongnu.org Subject: [PATCH RFC 08/22] i386: invert hyperv_spinlock_attempts setting logic with hv_passthrough Date: Fri, 4 Sep 2020 16:54:17 +0200 Message-Id: <20200904145431.196885-9-vkuznets@redhat.com> In-Reply-To: <20200904145431.196885-1-vkuznets@redhat.com> References: <20200904145431.196885-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=207.211.31.81; envelope-from=vkuznets@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/04 03:57:33 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , Marcelo Tosatti , Eduardo Habkost Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" There is no need to have this special case: like all other Hyper-V enlightenments we can just use kernel's supplied value in hv_passthrough mode. Signed-off-by: Vitaly Kuznetsov --- target/i386/kvm.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/target/i386/kvm.c b/target/i386/kvm.c index 1cb5592d4f7d..96ac719adca1 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -1265,11 +1265,7 @@ static int hyperv_handle_properties(CPUState *cs, c = cpuid_find_entry(cpuid, HV_CPUID_ENLIGHTMENT_INFO, 0); if (c) { env->features[FEAT_HV_RECOMM_EAX] = c->eax; - - /* hv-spinlocks may have been overriden */ - if (cpu->hyperv_spinlock_attempts != HYPERV_SPINLOCK_NEVER_RETRY) { - c->ebx = cpu->hyperv_spinlock_attempts; - } + cpu->hyperv_spinlock_attempts = c->ebx; } c = cpuid_find_entry(cpuid, HV_CPUID_NESTED_FEATURES, 0); if (c) {